Furman Sound AR-15 manual LiFT Linear Filtering Technology, Protection OK Indicator

AR-15 Voltage Regulator / power conditioner

Furman’s SMP+ clamps at 188 Vpk, (133 VAC RMS). This unprecedented level of protection is only available with Furman’s SMP+ technol- ogy. Additionally, Furman’s trusted over-volt- age circuitry protects against all too frequent accidental connections to 208 or 240 VAC, by shutting off the incoming power until the over voltage condition is corrected.

LiFT (Linear Filtering Technology)

Unfortunately, traditional AC filter - conditioners have been designed for unrealistic laboratory conditions. Prior technologies could actu- ally harm audio and video performance more than they help, due to the resonant peaking of their antiquated, non-linear designs. Under certain conditions, these designs can actually add more than 10 dB of noise to the incoming AC line! Furman’s SMP+ with LiFT takes an- other approach, ensuring optimal performance through linear filtering and no leakage to ground. With this exclusive filtration technol- ogy, all connected equipment will be free of noise and contamination and will operate at optimum performance levels.

Extreme Voltage Shutdown Indicator

This LED is normally off. It monitors a hazard common in the entertainment industry: wiring faults – for example, accidental connection to 220VAC where 120VAC is expected, or an open neutral from a 208 or 240VAC feed. The Series II SMP+ circuit senses voltages that are so high that operation would be impossible and shuts the power down before damage can occur. Upon initially applying power to these units, the Extreme Voltage indicator LED will light if the input voltage is above the extreme voltage cutoff, and power will not be applied to the unit’s outlets. If the unit has been

operating with an acceptable input voltage and subsequently that voltage exceeds 145- 150V, it will shut off power to the outlet and the Extreme Voltage LED will light.

NOTE: If the mains power is above the high cutoff voltage and has caused the unit to remove power from its outlets, it cannot restore power without the operator manually turning the unit off, then on again. Avoid turning the unit back on, without first checking the source of the problem, and perhaps changing the AC

source.

Protection OK Indicator

Although the Furman SMP+ circuit assures virtually protection from transient voltage spikes and surges, nature has a way of occasionally creating electrical forces that are beyond the capabilities of any TVSS device to absorb without some degree of damage. In the rare instance that this occurs, the green “Protection OK” LED indicator located on your front panel will dim. If this happens some level of protection from voltage surges will remain, but the Furman’s clamping voltage rating will be compromised. The unit must be returned to Furman Sound, or an authorized Furman Service center for repair.

Fuses and Circuit Breakers

There is one fuse and one circuit breaker in the AR-Series. In the event that the unit appears to be completely dead (neither the Power switch nor any LED’s light up), unplug the power cord and the load and check the breaker. If the cir- cuit breaker is tripped, a white button will pop up. Push it back in to reset it. The purposes of these circuit protection devices are:

1.A fast-blow 15 amp circuit breaker is acces- sible at the rear panel without removing the

3